Side shield raising device for roller mill hoppers



Noy. 17, 1936. P. HOLLSTEIN 2,060,868

SIDE SHIELD RAISING DEVICE FOR ROLLER MILL HOPPERS Filed Feb. 19, 1935 2 Sheets-Sheet l PM. HOLLSWAN Nov. 17, 1936. P. HOLL STEiN 2,0 0,368

SIDE SHIELD RAISING DEVICE F.OR ROLLER MILL HOPPERS Filed Febjle, 1935 I 2 Sheets-Sheet 2 Patented Nov. 17, 1936 UNITED STATES 2,060,838 SIDE SHIELD RAISING DEVICE FOR ROLLER MILL HOPPERS Paul Hollstein, Carlstadt, N. J., assignor to J. M. Lehmann Company, Inc New York, N. Y., a corporation of New York Application February 19, 1935, Serial No. 7,174

1 Claim.

This invention relates to roller mills, and has for an important object thereof to provide means in combination with a roller mill for quickly lifting the shields or hopper members to permit cleaning of the rolls and other parts of machine.

Another object of this invention is to provide in a roller mill means secured to the frame of the mill for adjustably Supporting shields or hopper members relative to the feed rollers, the means being operable under the movement of a lever.

A further object of this invention is to provide in a device of this kind means whereby the shields or hopper members may, after being lowered to operative position, be adjusted slightly relative to the rollers.

With the foregoing and other objects in View, the invention will be more fully described hereinafter, and will be more particularly pointed out in the claims appended hereto.

In the drawings, wherein like symbols refer to like or corresponding parts throughout the sev eral views,

Figure 1 is a detail front elevation partly broken away of one type of roller mill having a device constructed according to the preferred embodiment of this invention mounted thereon.

Figure 2 is a detail side elevation of the roller mill.

Figure 3 is a fragmentary enlarged side elevation of the hopper shields and the operating means therefor showing the shields in operative position.

Figure 4 is a view similar to Figure 3 with the device in inoperative position.

Figure 5 is a fragmentary longitudinal section partly in elevation of the device in applied position.

Referring now to the drawings, I0 designates generally a frame structure for a roller mill having a plurality of rollers I I journalled in the frame and operated by means of a power member I2 connected to the rollers as by a drive member I3 in the form of a belt or chain. The roller mill structure comprising the frame It], the rollers II and the power member I2 are here shown as only one type of mill structure to which the hereinafter described invention may be applied. As the mill structure here shown does not constitute in itself a part of this invention, a further description of the mill structure is believed to be unnecessary.

However, in roller mills where material is mixed, pulverized or ground in order to provide a means for retaining the material upon the feed rollers I I, I have provided a pair of hopper plates or shields I4 which are disposed one adjacent each end of the rollers I I. These shields or hopper members I4 have opposed segmental lower portions I5 terminating in a relatively sharp edge which is adapted to be disposed at substantially the line of contact between the two feed rollers I I.

The hopper members I4 have at substantially the central portion thereof an upwardly project ing arm I6 which is preferably integral therewith and provided with a longitudinal channel Il to receive a guide member I8 carried by a depending arm I9, which is preferably integral therewith. The depending arm I9 has a vertically disposed slot 20 in which a shield adjusting bolt 2| engages, the bolt 2I being threaded into the arm It.

Each arm I9 has a boss 22 which engages a tubular supporting member 23 extending transversely of the side members 2d of the frame Ill. The tubular member 23 is supported in upwardly spaced relation to the rollers I I by means of vertically disposed posts or supporting members 25 fixedly secured as by bolts 26 to the upper portion of the side members 24. End sleeve members 21 engage against the ends of the tubular supporting member 23, and each end member 2'1 has a vertically disposed sleeve or boss 28 in which a guide bar or slide member 29 is secured as by a pin 30 or the like.

The bar 29 is slidable in the post 25. A bushing 3I is disposed within the tubular member or sleeve 23 and within the sleeve 2? and serves as a connecting means between the two sleeves 23 and 21.

The supporting bar or member 23 is raised or lowered relative to the frame Ill and the rollers I I by an operating means including a shaft or bar 32 extending longitudinally through the sleeves 23 and 21 and rotatably engaging the bushings 3|. The shaft 32 has adjacent each end thereof a circular cam member or eccentric 33, each of which is fixed as by a pin 34 to the shaft 32. The shaft 32 is turned as by a handle or lever 35 fixed to the shaft.

The cam or eccentric 33 has the peripheral surface thereof contacting with a plate or fixed member 36 secured to the post 25 at one side of the bushing or sleeve 28.

The bosses 22 are fixedly secured to the tubular member 23 as by a set screw 37, so that the shields or hopper members I6 may be adjusted one relative to the other and relative to: the lengths of the rollers I I by adjustment of the bushings 22 along the length of the tubular member 23.

In the use and operation of this device, during the operation of the rollers II, the shields I4 will be in the position shown in Figure 3 with the opposed curved portions I5 disposed closely adjacent to the peripheries of the rollers II.

In this manner the material contacting with the rollers II will be held against passing off of the ends of the rollers, so that this material will be properly ground or acted upon by the rollers I I and any other rollers which may be associated with the rollers II. In the position shown in Figure 3, the lever 35 will be raised and the cam or eccentric 33 will have its lowest point contacting with the lug or table 36. After the machine has been in operation for a period of time and it is desired to clean the rollers II, which cleaning operation is facilitated by the raising of the shields or hopper members I4, the lever 35 is lowered raising the shields I4 under the action of the cams or eccentrics 33, which will draw the bar 23 upwardly and the bar 23 will be guided under the action of the slide members 29. When the rollers II have been properly cleaned, the handle 35 may be lowered thereby permitting the hopper members I4 to be lowered and the position of the hopper members I4 relative to the rollers I I may then be finely adjusted by means of hopper adjusting bolts or set screws 38, which are threaded into the posts 25 and engage in substantially conical or tapering openings 39 provided in the peripheral slide members 29.

It will, of course, be understood that each shield or hopper member I4 may be individually adjusted by means of the adjusting bolts 2|, but a relatively fine adjustment of these hopper members may be effected through the medium of the adjusting bolts 38.

It is obvious that various changes and modifications may be made in the details of construction and design of the above specifically described embodiment of this invention without departing from the spirit thereof, such changes and modifications being restricted only by the scope of the following claim:

What is claimed is:

In a roller mill including a frame and a pair of feed rollers rotatable in the frame, a pair of hopper members disposed one adjacent each end of the rollers and. adapted to fit into the bite of the rollers, an upstanding post carried by the frame at each end of the rollers in alinement with the bite thereof, a hollow shaft extending across the upper ends of the posts and fixed to said members, a shaft extending through said hollow shaft, an operating handle secured to one end of said latter shaft, a cam engaging member carried by each post, and a pair of circular cams secured to said latter shaft, said latter shaft being secured to the cams adjacent the periphery thereof whereby rotation of said cams will move the hopper members slowly when in proximity to the rollers, and will move the hopper members at a relatively rapid rate when away from the rollers.

PAUL HOLLSTEIN. 

